<template>
  <div id="quillEditor">
    <el-upload
      class="avatar-uploader"
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      style="display: none"
      ref="upload"
      v-if="this.type == 'url'"
    ></el-upload>

    <quill-editor
      :disabled="readOnly"
      :style="{height: styles.minHeight, width: styles.minWidth}"
      class="editor"
      v-model="editorContent"
      ref="customQuillEditor"
      :options="options"
    ></quill-editor>
    
  </div>
</template>

<script>
import { Quill } from "vue-quill-editor";
import Video from "./video"; // 这里引入修改过的video模块并注册
Quill.register("formats/iframe", Video, true);
import { getToken } from "@/utils/auth";

const toolbarOptions = [
  ["bold", "italic", "underline", "strike"], // toggled buttons
  ["blockquote", "code-block"],

  [{ header: 1 }, { header: 2 }], // custom button values
  [{ list: "ordered" }, { list: "bullet" }],
  [{ script: "sub" }, { script: "super" }], // superscript/subscript
  [{ indent: "-1" }, { indent: "+1" }], // outdent/indent
  [{ direction: "rtl" }], // text direction

  [{ size: ["small", false, "large", "huge"] }], // custom dropdown
  [{ header: [1, 2, 3, 4, 5, 6, false] }],

  [{ color: [] }, { background: [] }], // dropdown with defaults from theme
  [{ font: [] }],
  [{ align: [] }],
  ["link", "image", "video"], // 链接、视频、图片
  ["clean"] // remove formatting button
];

export default {
  name: "Editor",
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: ""
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null
    },
    /* 最小宽度 */
    minWidth: {
      type: Number,
      default: null
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false
    },
    // 上传文件大小限制(MB)
    fileSize: {
      type: Number,
      default: 5
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: "url"
    }
  },
  data() {
    return {
      uploadUrl: process.env.VUE_APP_BASE_API + "/system/oss/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken()
      },
      editorContent: "",
      currentValue: "",
      quill: null,
      options: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          imageResize: {
            displayStyles: {
              backgroundColor: "black",
              border: "none",
              color: "white"
            },
            modules: ["Resize", "DisplaySize", "Toolbar"]
          },
          // 工具栏配置
          toolbar: {
            container: toolbarOptions,
            handlers: {
              image: function(value) {
                if (value) {
                  document
                    .querySelector("#quillEditor .avatar-uploader input")
                    .click();
                } else {
                  this.quill.format("image", false);
                }
              },
              video: function(value) {
                if (value) {
                  document
                    .querySelector("#quillEditor .avatar-uploader input")
                    .click();
                } else {
                  this.quill.format("video", false);
                }
              }
            }
          }
        },
        placeholder: "请输入内容"
      }
    };
  },

  beforeDestroy() {
    this.quill = null;
  },

  mounted() {
    this.init();
  },

  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.minWidth) {
        style.minWidth = `${this.minWidth}px`;
      }
      return style;
    }
  },

  watch: {
    value(newValue) {
      // 监听父组件传递的值变化
      this.editorContent = newValue;
    },
    editorContent(newContent) {
      // 监听富文本编辑器内容变化
      this.$emit("input", newContent);
    }
  },

  methods: {
    init() {
      this.quill = this.$refs.customQuillEditor.quill;
    },

    linkChange(href) {
      this.quill.format("link", href);
      this.closeLinkBox();
    },

    closeLinkBox() {
      this.dialogVisible = false;
      this.linkForm = "";
    },

    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      return true;
    },

    handleUploadSuccess(res, file) {
      // 如果上传成功
      if (res.code == 200) {
        //拼接出上传的图片在服务器的完整地址
        const imgUrl = res.data.url;
        const type = imgUrl.substring(imgUrl.lastIndexOf(".") + 1);
        // 获取富文本组件实例
        const quill = this.quill;
        // 获取光标所在位置
        const length = quill.getSelection().index;
        // 插入图片||视频  res.info为服务器返回的图片地址
        if (type == "mp4" || type == "MP4") {
          window.jsValue = imgUrl;
          quill.insertEmbed(length, "video", imgUrl);
        } else {
          quill.insertEmbed(length, "image", imgUrl);
        }
        // 调整光标到最后
        quill.setSelection(length + 1);
      } else {
        this.$message.error(res.msg);
      }
    },

    handleUploadError() {
      this.$message.error("图片插入失败");
    }
  }
};
</script>

<style>
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}

.linkBox .el-dialog__header {
  display: none;
}
.linkBox .el-dialog__body {
  padding-bottom: 0 !important;
}
.linkBox .el-dialog {
  margin-top: 40vh !important;
}
</style>
